Sustained Lithium‐Storage Performance of Hierarchical, Nanoporous Anatase TiO2 at High Rates: Emphasis on Interfacial Storage Phenomena

• DOI: 10.1002/adfm.201002527
• Publication Date: 2011-08-03T10:06:15Z
• Authors: Ji‐Yong Shin; Dominik Samuelis; Joachim Maier
• Keywords: Nanoporous; Specific surface area

Abstract A hierarchical, nanoporous TiO 2 structure is successfully prepared by a simple in situ hydrolysis method. Used as an anode material, it achieves sustained high lithium storage performance especially at charge/discharge rates due to its substantially surface area. The material shows two different major modes: a) bulk insertion, and b) pseudo‐capacitive interfacial storage, which responsible for 64% of the total capacity. In order kinetically emphasize even further, we cycle directly rates, giving 302 mA h g −1 200 fully reversible discharge capacity 1 C 5 with very stability. We propose overall view on Li insertion mechanisms high‐surface‐area importance electrode applications Li‐ion batteries.